>>>>I am going to hang a 200-amp meter/main combo on the outside corner of my garage at the front of the house. On the back wall of my garage there is a 12/24 125-amp subpanel with lugs. Additionally, I cut in another 12/24 125-amp subpanel in my 3rd bedroom behind the door.
QUESTION: What size feeder should I use to the subs? I either want to go 90-amp, 100-amp, or all the way to 125-amp depending on what is the most cost effective. Should I go aluminum or copper? If so, what size wire do I need. I'll go with x/3 w/ground Romex. Panel #1 is about a 35' run and panel #2 is about a 70' run. THANKS!
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Sorry for the double post! I'm a newbie here!
Feeder 3 6 4 Romex Ampacity
(By-the-Foot) 4/0-4/0-4/0-2/0 Gray Stranded AL SER Cable Southwire's AlumaFlex SER is used for powering Southwire's AlumaFlex SER is used for powering the service drop to the meter base and the meter base to the distribution panel board. It is also used for dryers, A/C units, ranges and heat pumps. It is available with 2,3 or 4 conductors. 3 Conductors Black, White and Red. Soft Drawn Copper 600V. Overall nylon jacketed black. APPLICATIONS: NM-B (nonmetallic-sheathed cable) may be used for both exposed and concealed work in normally dry locations at temperatures not higher than 90 deg C with ampacity limited to 60 deg C conductors as. Feeders for 40 amp 230 volt SUB services #6-2 w/gnd larger heat pump/AC compressors 230 volt heat circuits to 11,000 watts #6-3 w/gnd free-standing ranges, feeders for 60 amp 230 volt SUB services #4-3 w/gnd feeder for 70 amp SUB services NMB Nonmetallic Cable (Romex) #2-3 w/gnd feeder for 100 amp SUB services. 6/3 Romex = 55A 4/3 Romex = 70A Contractor #1 6/3 Romex NEC 240.4(B) exception allows rounding to next highest breaker size if wire ampacity is in between breaker sizes. Contractor #2 4/3 Romex +$220 more expensive As a side note, what wire size are you running to your Tesla Wall Connector (HPWC)? Flux 7 1 3 – advanced web design tool.
